Groveler and Yes man

Groveler noun - Someone who humbles himself as a sign of respect; who behaves as if he had no self-respect.

Yes man and groveler are semantically related in yes person topic. In some cases you can use "Yes man" instead a noun "Groveler".

Groveler and yes man are semantically related in someone following orders without question topic. You can use "Groveler" instead a noun phrase "Yes man".